diff --git a/contrib/plotting-visualization/index.md b/contrib/plotting-visualization/index.md
index e7c5745..cabea95 100644
--- a/contrib/plotting-visualization/index.md
+++ b/contrib/plotting-visualization/index.md
@@ -1,4 +1,4 @@
 # List of sections
 
-- [Installing Matplotlib](matplotlib_installation.md)
-- [Bar Plots in Matplotlib](matplotlib_bar_plots.md)
+- [Installing Matplotlib](installation.md)
+- [Bar Plots in Matplotlib](bar-plots.md)